Niche and interspecific association of main woody plants in Myrica nana shrubland in central Yunnan, China

doi:10.17521/cjpe.2021.0305

Abstract

Abstract:

Aims Niche studies play an important role in understanding the interspecific associations of communities. The study of interspecific relationship is important for understanding community structure, function and classification. Our objective was to quantitatively analyze the niche and interspecific association of main woody plants in Myrica nana shrubland in central Yunnan.
Methods Methods including niche measurement, variance ratio, chi-square test, Pearson correlation test, and Spearman rank correlation test, were used.
Important findings Results showed that: (1) Levins and Shannon’s niche width measurement results showed that M. nana had the widest niche width in the community, while Rubus aurantiacus var. obtusifolius had the narrowest one. There was no consistent relationship between niche width and important value, and some species had larger niche width and smaller important value, indicating that these species had greater development potential. (2) The value of the niche overlap index was generally small, which showed that the demand similarity for environmental resources among the main species was small, and the competition between main species was not strong. (3) Species with larger niche width had a higher probability of niche overlap with other species, but this was not absolute, some species with small niche width value also had a higher degree of niche overlap. (4) The overall connectivity of the main species showed a significant positive correlation, indicating that the community species could coexist harmoniously and the community structure tended to be stable. (5) Chi-square test, Pearson correlation test and Spearman rank correlation test revealed no significant relationship between most of the species pairs, indicating that the connection between species pairs in the community was weak, and each species showed an independent distribution pattern. (6) Pearson correlation coefficient and Spearman rank correlation coefficient among main species both had a very significant positive correlation with the niche overlap index, indicating that when the species pairs showed extremely significant positive associations, the niche overlap value was large, and when the species pairs showed extremely significant negative associations, the niche overlap value was small.

Key words: niche, interspecific association, Myrica nana, shrubland, central Yunnan

ZHANG Ling-Nian, ZHU Gui-Qing, YANG Kuan, LIU Xing-Yue, GONG He-De, ZHENG Li. Niche and interspecific association of main woody plants in Myrica nana shrubland in central Yunnan, China[J]. Chin J Plant Ecol, 2022, 46(11): 1400-1410.

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Figures/Tables 9

References 38

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编号 No.	物种 Species	重要值 Important value (%)	生态位宽度 Niche width
编号 No.	物种 Species	重要值 Important value (%)	Levins 指数 B_L	Shannon 指数 B_S
1	云南杨梅 Myrica nana	15.13	27.36	3.38
2	西南金丝梅 Hypericum henryi	13.01	12.40	2.68
3	樟叶越桔 Vaccinium dunalianum	9.58	10.67	2.69
4	乌鸦果 Vaccinium fragile	9.31	7.13	2.22
5	铁仔 Myrsine africana	6.09	8.58	2.27
6	碎米花 Rhododendron spiciferum	5.16	5.28	1.81
7	茅莓 Rubus parvifolius	3.91	4.84	1.75
8	云南松 Pinus yunnanensis	2.69	6.74	2.05
9	滇青冈 Cyclobalanopsis glaucoides	2.43	5.00	1.75
10	野丁香 Leptodermis potaninii	1.81	4.84	1.67
11	粉叶小檗 Berberis pruinosa	1.77	3.08	1.21
12	芳香白珠 Gaultheria fragrantissima	1.65	2.28	0.92
13	钝叶橘红悬钩子 Rubus aurantiacus var. obtusifolius	1.56	1.85	0.65
14	川梨 Pyrus pashia	1.45	4.57	1.56
15	元江锥 Castanopsis orthacantha	1.37	3.10	1.24
16	火棘 Pyracantha fortuneana	1.32	2.94	1.19
17	亮毛杜鹃 Rhododendron microphyton	1.29	2.58	1.00
18	高山锥 Castanopsis delavayi	1.28	2.61	1.15
19	南烛 Vaccinium bracteatum	1.28	3.86	1.37
20	怒江红山茶 Camellia saluenensis	1.24	2.19	0.93

编号 No.	物种 Species	重要值 Important value (%)	生态位宽度 Niche width
编号 No.	物种 Species	重要值 Important value (%)	Levins 指数 B_L	Shannon 指数 B_S
1	云南杨梅 Myrica nana	15.13	27.36	3.38
2	西南金丝梅 Hypericum henryi	13.01	12.40	2.68
3	樟叶越桔 Vaccinium dunalianum	9.58	10.67	2.69
4	乌鸦果 Vaccinium fragile	9.31	7.13	2.22
5	铁仔 Myrsine africana	6.09	8.58	2.27
6	碎米花 Rhododendron spiciferum	5.16	5.28	1.81
7	茅莓 Rubus parvifolius	3.91	4.84	1.75
8	云南松 Pinus yunnanensis	2.69	6.74	2.05
9	滇青冈 Cyclobalanopsis glaucoides	2.43	5.00	1.75
10	野丁香 Leptodermis potaninii	1.81	4.84	1.67
11	粉叶小檗 Berberis pruinosa	1.77	3.08	1.21
12	芳香白珠 Gaultheria fragrantissima	1.65	2.28	0.92
13	钝叶橘红悬钩子 Rubus aurantiacus var. obtusifolius	1.56	1.85	0.65
14	川梨 Pyrus pashia	1.45	4.57	1.56
15	元江锥 Castanopsis orthacantha	1.37	3.10	1.24
16	火棘 Pyracantha fortuneana	1.32	2.94	1.19
17	亮毛杜鹃 Rhododendron microphyton	1.29	2.58	1.00
18	高山锥 Castanopsis delavayi	1.28	2.61	1.15
19	南烛 Vaccinium bracteatum	1.28	3.86	1.37
20	怒江红山茶 Camellia saluenensis	1.24	2.19	0.93

No.	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20
1	0.483	0.445	0.282	0.319	0.201	0.242	0.210	0.244	0.216	0.102	0.068	0.057	0.131	0.091	0.125	0.062	0.148	0.159	0.074
2		0.295	0.295	0.377	0.145	0.359	0.068	0.317	0.297	0.305	0.063	0.219	0.250	0.026	0.167	0.000	0.111	0.000	0.255
3			0.262	0.296	0.478	0.278	0.359	0.162	0.387	0.009	0.153	0.000	0.054	0.207	0.063	0.126	0.234	0.000	0.000
4				0.117	0.022	0.142	0.182	0.060	0.398	0.075	0.091	0.075	0.090	0.091	0.022	0.164	0.037	0.000	0.075
5					0.457	0.294	0.268	0.271	0.195	0.273	0.000	0.195	0.190	0.000	0.243	0.000	0.000	0.000	0.273
6						0.287	0.202	0.070	0.260	0.000	0.324	0.000	0.000	0.324	0.100	0.000	0.280	0.000	0.000
7							0.083	0.167	0.307	0.050	0.000	0.000	0.000	0.000	0.371	0.000	0.042	0.000	0.000
8								0.175	0.063	0.000	0.063	0.000	0.063	0.063	0.100	0.438	0.063	0.000	0.000
9									0.100	0.050	0.000	0.000	0.000	0.000	0.050	0.000	0.100	0.000	0.000
10										0.000	0.091	0.000	0.000	0.000	0.091	0.000	0.111	0.000	0.000
11											0.000	0.750	0.375	0.000	0.200	0.000	0.000	0.000	0.704
12												0.000	0.000	0.455	0.000	0.000	0.333	0.000	0.000
13													0.375	0.000	0.000	0.000	0.000	0.000	0.514
14														0.000	0.000	0.000	0.000	0.000	0.375
15															0.000	0.000	0.747	0.000	0.000
16																0.000	0.000	0.000	0.231
17																	0.000	0.000	0.000
18																		0.000	0.000
19																			0.000

No.	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20
1	0.483	0.445	0.282	0.319	0.201	0.242	0.210	0.244	0.216	0.102	0.068	0.057	0.131	0.091	0.125	0.062	0.148	0.159	0.074
2		0.295	0.295	0.377	0.145	0.359	0.068	0.317	0.297	0.305	0.063	0.219	0.250	0.026	0.167	0.000	0.111	0.000	0.255
3			0.262	0.296	0.478	0.278	0.359	0.162	0.387	0.009	0.153	0.000	0.054	0.207	0.063	0.126	0.234	0.000	0.000
4				0.117	0.022	0.142	0.182	0.060	0.398	0.075	0.091	0.075	0.090	0.091	0.022	0.164	0.037	0.000	0.075
5					0.457	0.294	0.268	0.271	0.195	0.273	0.000	0.195	0.190	0.000	0.243	0.000	0.000	0.000	0.273
6						0.287	0.202	0.070	0.260	0.000	0.324	0.000	0.000	0.324	0.100	0.000	0.280	0.000	0.000
7							0.083	0.167	0.307	0.050	0.000	0.000	0.000	0.000	0.371	0.000	0.042	0.000	0.000
8								0.175	0.063	0.000	0.063	0.000	0.063	0.063	0.100	0.438	0.063	0.000	0.000
9									0.100	0.050	0.000	0.000	0.000	0.000	0.050	0.000	0.100	0.000	0.000
10										0.000	0.091	0.000	0.000	0.000	0.091	0.000	0.111	0.000	0.000
11											0.000	0.750	0.375	0.000	0.200	0.000	0.000	0.000	0.704
12												0.000	0.000	0.455	0.000	0.000	0.333	0.000	0.000
13													0.375	0.000	0.000	0.000	0.000	0.000	0.514
14														0.000	0.000	0.000	0.000	0.000	0.375
15															0.000	0.000	0.747	0.000	0.000
16																0.000	0.000	0.000	0.231
17																	0.000	0.000	0.000
18																		0.000	0.000
19																			0.000

No.	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20
1	0.629	0.460	0.325	0.476	0.325	0.381	0.304	0.409	0.422	0.245	0.147	0.225	0.302	0.290	0.265	0.130	0.347	0.402	0.159
2		0.286	0.370	0.435	0.167	0.446	0.042	0.310	0.422	0.589	0.030	0.560	0.358	0.015	0.346	0.000	0.072	0.000	0.420
3			0.185	0.432	0.663	0.375	0.468	0.148	0.577	0.003	0.303	0.000	0.055	0.368	0.066	0.257	0.312	0.000	0.000
4				0.083	0.004	0.187	0.191	0.038	0.466	0.133	0.066	0.143	0.096	0.102	0.021	0.265	0.018	0.000	0.100
5					0.643	0.279	0.296	0.379	0.251	0.464	0.000	0.425	0.203	0.000	0.281	0.000	0.000	0.000	0.338
6						0.231	0.241	0.043	0.298	0.000	0.507	0.000	0.000	0.301	0.061	0.000	0.203	0.000	0.000
7							0.037	0.102	0.348	0.020	0.000	0.000	0.000	0.000	0.472	0.000	0.016	0.000	0.000
8								0.236	0.097	0.000	0.089	0.000	0.087	0.078	0.083	0.633	0.029	0.000	0.000
9									0.089	0.029	0.000	0.000	0.000	0.000	0.019	0.000	0.040	0.000	0.000
10										0.000	0.082	0.000	0.000	0.000	0.034	0.000	0.072	0.000	0.000
11											0.000	0.913	0.516	0.000	0.241	0.000	0.000	0.000	0.840
12												0.000	0.000	0.528	0.000	0.000	0.395	0.000	0.000
13													0.495	0.000	0.000	0.000	0.000	0.000	0.646
14														0.000	0.000	0.000	0.000	0.000	0.548
15															0.000	0.000	0.920	0.000	0.000
16																0.000	0.000	0.000	0.235
17																	0.000	0.000	0.000
18																		0.000	0.000
19																			0.000